src/main/modules.c

   1 /*
   2  * modules.c    Radius module support.
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * Copyright 2003,2006  The FreeRADIUS server project
  21  * Copyright 2000  Alan DeKok <aland@ox.org>
  22  * Copyright 2000  Alan Curry <pacman@world.std.com>
  23  */
  24
  25 #include <freeradius-devel/ident.h>
  26 RCSID("$Id$")
  27
  28 #include <freeradius-devel/radiusd.h>
  29 #include <freeradius-devel/modpriv.h>
  30 #include <freeradius-devel/modcall.h>
  31 #include <freeradius-devel/rad_assert.h>
  32
  33 extern int check_config;
  34
  35 typedef struct indexed_modcallable {
  36         int             comp;
  37         int             idx;
  38         modcallable     *modulelist;
  39 } indexed_modcallable;
  40
  41 typedef struct virtual_server_t {
  42         const char      *name;
  43         time_t          created;
  44         int             can_free;
  45         CONF_SECTION    *cs;
  46         rbtree_t        *components;
  47         modcallable     *mc[RLM_COMPONENT_COUNT];
  48         CONF_SECTION    *subcs[RLM_COMPONENT_COUNT];
  49         struct virtual_server_t *next;
  50 } virtual_server_t;
  51
  52 /*
  53  *      Keep a hash of virtual servers, so that we can reload them.
  54  */
  55 #define VIRTUAL_SERVER_HASH_SIZE (256)
  56 static virtual_server_t *virtual_servers[VIRTUAL_SERVER_HASH_SIZE];
  57
  58 static rbtree_t *module_tree = NULL;
  59
  60 static rbtree_t *instance_tree = NULL;
  61
  62 struct fr_module_hup_t {
  63         module_instance_t       *mi;
  64         time_t                  when;
  65         void                    *insthandle;
  66         fr_module_hup_t         *next;
  67 };
  68
  69 /*
  70  *      Ordered by component
  71  */
  72 const section_type_value_t section_type_value[RLM_COMPONENT_COUNT] = {
  73         { "authenticate", "Auth-Type",       PW_AUTH_TYPE },
  74         { "authorize",    "Autz-Type",       PW_AUTZ_TYPE },
  75         { "preacct",      "Pre-Acct-Type",   PW_PRE_ACCT_TYPE },
  76         { "accounting",   "Acct-Type",       PW_ACCT_TYPE },
  77         { "session",      "Session-Type",    PW_SESSION_TYPE },
  78         { "pre-proxy",    "Pre-Proxy-Type",  PW_PRE_PROXY_TYPE },
  79         { "post-proxy",   "Post-Proxy-Type", PW_POST_PROXY_TYPE },
  80         { "post-auth",    "Post-Auth-Type",  PW_POST_AUTH_TYPE }
  81 #ifdef WITH_COA
  82         ,
  83         { "recv-coa",     "Recv-CoA-Type",   PW_RECV_COA_TYPE },
  84         { "send-coa",     "Send-CoA-Type",   PW_SEND_COA_TYPE }
  85 #endif
  86 };
  87
  88
  89 #ifdef WITHOUT_LIBLTDL
  90 #ifdef WITH_DLOPEN
  91 #include <dlfcn.h>
  92
  93 #ifndef RTLD_NOW
  94 #define RTLD_NOW (0)
  95 #endif
  96 #ifndef RTLD_LOCAL
  97 #define RTLD_LOCAL (0)
  98 #endif
  99
 100 #define fr_dlopenext lt_dlopenext
 101 #ifndef LT_SHREXT
 102 #ifdef __APPLE__
 103 #define LT_SHREXT ".dylib"
 104 #define LD_LIBRARY_PATH "DYLD_FALLBACK_LIBRARY_PATH"
 105 #elif defined (WIN32)
 106 #define LT_SHREXT ".dll"
 107 #else
 108 #define LT_SHREXT ".so"
 109 #define LD_LIBRARY_PATH "LD_LIBRARY_PATH"
 110 #endif
 111 #endif
 112
 113 int lt_dlinit(void)
 114 {
 115         char *p, *val;
 116         char buffer[1024];
 117
 118         /*
 119          *      This doesn't really do anything...
 120          */
 121         p = getenv(LD_LIBRARY_PATH);
 122         if (p) {
 123                 snprintf(buffer, sizeof(buffer), "%s:%s", p, radlib_dir);
 124                 val = buffer;
 125         } else {
 126                 val = radlib_dir;
 127         }
 128
 129         return setenv(LD_LIBRARY_PATH, val, 1);
 130 }
 131
 132 lt_dlhandle lt_dlopenext(const char *name)
 133 {
 134         void *handle;
 135         char buffer[2048];
 136
 137         /*
 138          *      Prefer loading our libraries by absolute path.
 139          */
 140         snprintf(buffer, sizeof(buffer), "%s/%s%s", radlib_dir, name, LT_SHREXT);
 141         handle = dlopen(buffer, RTLD_NOW | RTLD_LOCAL);
 142         if (handle) return handle;
 143
 144         strlcpy(buffer, name, sizeof(buffer));
 145
 146         /*
 147          *      FIXME: Make this configurable...
 148          */
 149         strlcat(buffer, LT_SHREXT, sizeof(buffer));
 150
 151         return dlopen(buffer, RTLD_NOW | RTLD_LOCAL);
 152 }
 153
 154 void *lt_dlsym(lt_dlhandle handle, UNUSED const char *symbol)
 155 {
 156         return dlsym(handle, symbol);
 157 }
 158
 159 int lt_dlclose(lt_dlhandle handle)
 160 {
 161         if (!handle) return 0;
 162
 163         return dlclose(handle);
 164 }
 165
 166 const char *lt_dlerror(void)
 167 {
 168         return dlerror();
 169 }
 170
 171
 172 #else  /* without dlopen */
 173 typedef struct lt_dlmodule_t {
 174   const char    *name;
 175   void          *ref;
 176 } lt_dlmodule_t;
 177
 178 typedef struct eap_type_t EAP_TYPE;
 179 typedef struct rlm_sql_module_t rlm_sql_module_t;
 180
 181 /*
 182  *      FIXME: Write hackery to auto-generate this data.
 183  *      We only need to do this on systems that don't have dlopen.
 184  */
 185 extern module_t rlm_pap;
 186 extern module_t rlm_chap;
 187 extern module_t rlm_eap;
 188 extern module_t rlm_sql;
 189 /* and so on ... */
 190
 191 extern EAP_TYPE rlm_eap_md5;
 192 extern rlm_sql_module_t rlm_sql_mysql;
 193 /* and so on ... */
 194
 195 static const lt_dlmodule_t lt_dlmodules[] = {
 196         { "rlm_pap", &rlm_pap },
 197         { "rlm_chap", &rlm_chap },
 198         { "rlm_eap", &rlm_eap },
 199         /* and so on ... */
 200
 201         { "rlm_eap_md5", &rlm_eap_md5 },
 202         /* and so on ... */
 203
 204         { "rlm_sql_mysql", &rlm_sql_mysql },
 205         /* and so on ... */
 206
 207         { NULL, NULL }
 208 };
 209
 210 #define fr_dlopenext lt_dlopenext
 211 lt_dlhandle lt_dlopenext(const char *name)
 212 {
 213         int i;
 214
 215         for (i = 0; lt_dlmodules[i].name != NULL; i++) {
 216                 if (strcmp(name, lt_dlmodules[i].name) == 0) {
 217                         return lt_dlmodules[i].ref;
 218                 }
 219         }
 220
 221         return NULL;
 222 }
 223
 224 void *lt_dlsym(lt_dlhandle handle, UNUSED const char *symbol)
 225 {
 226         return handle;
 227 }
 228
 229 int lt_dlclose(lt_dlhandle handle)
 230 {
 231         return 0;
 232 }
 233
 234 const char *lt_dlerror(void)
 235 {
 236         return "Unspecified error";
 237 }
 238
 239 #endif  /* WITH_DLOPEN */
 240 #else   /* WITHOUT_LIBLTDL */
 241
 242 /*
 243  *      Solve the issues of libraries linking to other libraries
 244  *      by using a newer libltdl API.
 245  */
 246 #ifndef HAVE_LT_DLADVISE_INIT
 247 #define fr_dlopenext lt_dlopenext
 248 #else
 249 static lt_dlhandle fr_dlopenext(const char *filename)
 250 {
 251         lt_dlhandle handle = 0;
 252         lt_dladvise advise;
 253
 254         if (!lt_dladvise_init (&advise) &&
 255             !lt_dladvise_ext (&advise) &&
 256             !lt_dladvise_global (&advise)) {
 257                 handle = lt_dlopenadvise (filename, advise);
 258         }
 259
 260         lt_dladvise_destroy (&advise);
 261
 262         return handle;
 263 }
 264 #endif  /* HAVE_LT_DLADVISE_INIT */
 265 #endif /* WITHOUT_LIBLTDL */
 266
 267 static int virtual_server_idx(const char *name)
 268 {
 269         uint32_t hash;
 270
 271         if (!name) return 0;
 272
 273         hash = fr_hash_string(name);
 274
 275         return hash & (VIRTUAL_SERVER_HASH_SIZE - 1);
 276 }
 277
 278 static virtual_server_t *virtual_server_find(const char *name)
 279 {
 280         int rcode;
 281         virtual_server_t *server;
 282
 283         rcode = virtual_server_idx(name);
 284         for (server = virtual_servers[rcode];
 285              server != NULL;
 286              server = server->next) {
 287                 if (!name && !server->name) break;
 288
 289                 if ((name && server->name) &&
 290                     (strcmp(name, server->name) == 0)) break;
 291         }
 292
 293         return server;
 294 }
 295
 296 static void virtual_server_free(virtual_server_t *server)
 297 {
 298         if (!server) return;
 299
 300         if (server->components) rbtree_free(server->components);
 301         server->components = NULL;
 302
 303         free(server);
 304 }
 305
 306 void virtual_servers_free(time_t when)
 307 {
 308         int i;
 309         virtual_server_t **last;
 310
 311         for (i = 0; i < VIRTUAL_SERVER_HASH_SIZE; i++) {
 312                 virtual_server_t *server, *next;
 313
 314                 last = &virtual_servers[i];
 315                 for (server = virtual_servers[i];
 316                      server != NULL;
 317                      server = next) {
 318                         next = server->next;
 319
 320                         /*
 321                          *      If we delete it, fix the links so that
 322                          *      we don't orphan anything.  Also,
 323                          *      delete it if it's old, AND a newer one
 324                          *      was defined.
 325                          *
 326                          *      Otherwise, the last pointer gets set to
 327                          *      the one we didn't delete.
 328                          */
 329                         if ((when == 0) ||
 330                             ((server->created < when) && server->can_free)) {
 331                                 *last = server->next;
 332                                 virtual_server_free(server);
 333                         } else {
 334                                 last = &(server->next);
 335                         }
 336                 }
 337         }
 338 }
 339
 340 static void indexed_modcallable_free(void *data)
 341 {
 342         indexed_modcallable *c = data;
 343
 344         modcallable_free(&c->modulelist);
 345         free(c);
 346 }
 347
 348 static int indexed_modcallable_cmp(const void *one, const void *two)
 349 {
 350         const indexed_modcallable *a = one;
 351         const indexed_modcallable *b = two;
 352
 353         if (a->comp < b->comp) return -1;
 354         if (a->comp >  b->comp) return +1;
 355
 356         return a->idx - b->idx;
 357 }
 358
 359
 360 /*
 361  *      Compare two module entries
 362  */
 363 static int module_instance_cmp(const void *one, const void *two)
 364 {
 365         const module_instance_t *a = one;
 366         const module_instance_t *b = two;
 367
 368         return strcmp(a->name, b->name);
 369 }
 370
 371
 372 static void module_instance_free_old(CONF_SECTION *cs, module_instance_t *node,
 373                                      time_t when)
 374 {
 375         fr_module_hup_t *mh, **last;
 376
 377         /*
 378          *      Walk the list, freeing up old instances.
 379          */
 380         last = &(node->mh);
 381         while (*last) {
 382                 mh = *last;
 383
 384                 /*
 385                  *      Free only every 60 seconds.
 386                  */
 387                 if ((when - mh->when) < 60) {
 388                         last = &(mh->next);
 389                         continue;
 390                 }
 391
 392                 cf_section_parse_free(cs, mh->insthandle);
 393
 394                 if (node->entry->module->detach) {
 395                         (node->entry->module->detach)(mh->insthandle);
 396                 } else {
 397                         free(mh->insthandle);
 398                 }
 399
 400                 *last = mh->next;
 401                 free(mh);
 402         }
 403 }
 404
 405
 406 /*
 407  *      Free a module instance.
 408  */
 409 static void module_instance_free(void *data)
 410 {
 411         module_instance_t *this = data;
 412
 413         module_instance_free_old(this->cs, this, time(NULL) + 100);
 414
 415         if (this->entry->module->detach) {
 416                 (this->entry->module->detach)(this->insthandle);
 417         }
 418
 419 #ifdef HAVE_PTHREAD_H
 420         if (this->mutex) {
 421                 /*
 422                  *      FIXME
 423                  *      The mutex MIGHT be locked...
 424                  *      we'll check for that later, I guess.
 425                  */
 426                 pthread_mutex_destroy(this->mutex);
 427                 free(this->mutex);
 428         }
 429 #endif
 430         memset(this, 0, sizeof(*this));
 431         free(this);
 432 }
 433
 434
 435 /*
 436  *      Compare two module entries
 437  */
 438 static int module_entry_cmp(const void *one, const void *two)
 439 {
 440         const module_entry_t *a = one;
 441         const module_entry_t *b = two;
 442
 443         return strcmp(a->name, b->name);
 444 }
 445
 446 /*
 447  *      Free a module entry.
 448  */
 449 static void module_entry_free(void *data)
 450 {
 451         module_entry_t *this = data;
 452
 453         lt_dlclose(this->handle);       /* ignore any errors */
 454         memset(this, 0, sizeof(*this));
 455         free(this);
 456 }
 457
 458
 459 /*
 460  *      Remove the module lists.
 461  */
 462 int detach_modules(void)
 463 {
 464         rbtree_free(instance_tree);
 465         rbtree_free(module_tree);
 466
 467         lt_dlexit();
 468
 469         return 0;
 470 }
 471
 472
 473 /*
 474  *      Find a module on disk or in memory, and link to it.
 475  */
 476 static module_entry_t *linkto_module(const char *module_name,
 477                                      CONF_SECTION *cs)
 478 {
 479         module_entry_t myentry;
 480         module_entry_t *node;
 481         lt_dlhandle handle = NULL;
 482         char module_struct[256];
 483         char *p;
 484         const module_t *module;
 485
 486         strlcpy(myentry.name, module_name, sizeof(myentry.name));
 487         node = rbtree_finddata(module_tree, &myentry);
 488         if (node) return node;
 489
 490         /*
 491          *      Link to the module's rlm_FOO{} module structure.
 492          *
 493          *      The module_name variable has the version number
 494          *      embedded in it, and we don't want that here.
 495          */
 496         strcpy(module_struct, module_name);
 497         p = strrchr(module_struct, '-');
 498         if (p) *p = '\0';
 499
 500 #if defined(WITHOUT_LIBLTDL) && defined (WITH_DLOPEN) && defined(RTLD_SELF)
 501         module = lt_dlsym(RTLD_SELF, module_struct);
 502         if (module) goto open_self;
 503 #endif
 504
 505         /*
 506          *      Keep the handle around so we can dlclose() it.
 507          */
 508         handle = fr_dlopenext(module_name);
 509         if (handle == NULL) {
 510                 cf_log_err(cf_sectiontoitem(cs),
 511                            "Failed to link to module '%s': %s\n",
 512                            module_name, lt_dlerror());
 513                 return NULL;
 514         }
 515
 516         DEBUG3("    (Loaded %s, checking if it's valid)", module_name);
 517
 518         /*
 519          *      libltld MAY core here, if the handle it gives us contains
 520          *      garbage data.
 521          */
 522         module = lt_dlsym(handle, module_struct);
 523         if (!module) {
 524                 cf_log_err(cf_sectiontoitem(cs),
 525                            "Failed linking to %s structure: %s\n",
 526                            module_name, lt_dlerror());
 527                 lt_dlclose(handle);
 528                 return NULL;
 529         }
 530
 531 #if defined(WITHOUT_LIBLTDL) && defined (WITH_DLOPEN) && defined(RTLD_SELF)
 532  open_self:
 533 #endif
 534         /*
 535          *      Before doing anything else, check if it's sane.
 536          */
 537         if (module->magic != RLM_MODULE_MAGIC_NUMBER) {
 538                 lt_dlclose(handle);
 539                 cf_log_err(cf_sectiontoitem(cs),
 540                            "Invalid version in module '%s'",
 541                            module_name);
 542                 return NULL;
 543
 544         }
 545
 546         /* make room for the module type */
 547         node = rad_malloc(sizeof(*node));
 548         memset(node, 0, sizeof(*node));
 549         strlcpy(node->name, module_name, sizeof(node->name));
 550         node->module = module;
 551         node->handle = handle;
 552
 553         cf_log_module(cs, "Linked to module %s", module_name);
 554
 555         /*
 556          *      Add the module as "rlm_foo-version" to the configuration
 557          *      section.
 558          */
 559         if (!rbtree_insert(module_tree, node)) {
 560                 radlog(L_ERR, "Failed to cache module %s", module_name);
 561                 lt_dlclose(handle);
 562                 free(node);
 563                 return NULL;
 564         }
 565
 566         return node;
 567 }
 568
 569 /*
 570  *      Find a module instance.
 571  */
 572 module_instance_t *find_module_instance(CONF_SECTION *modules,
 573                                         const char *instname, int do_link)
 574 {
 575         int check_config_safe = FALSE;
 576         CONF_SECTION *cs;
 577         const char *name1;
 578         module_instance_t *node, myNode;
 579         char module_name[256];
 580
 581         if (!modules) return NULL;
 582
 583         /*
 584          *      Module instances are declared in the modules{} block
 585          *      and referenced later by their name, which is the
 586          *      name2 from the config section, or name1 if there was
 587          *      no name2.
 588          */
 589         cs = cf_section_sub_find_name2(modules, NULL, instname);
 590         if (cs == NULL) {
 591                 radlog(L_ERR, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
 592                 return NULL;
 593         }
 594
 595         /*
 596          *      If there's already a module instance, return it.
 597          */
 598         strlcpy(myNode.name, instname, sizeof(myNode.name));
 599         node = rbtree_finddata(instance_tree, &myNode);
 600         if (node) return node;
 601
 602         if (!do_link) return NULL;
 603
 604         name1 = cf_section_name1(cs);
 605
 606         /*
 607          *      Found the configuration entry.
 608          */
 609         node = rad_malloc(sizeof(*node));
 610         memset(node, 0, sizeof(*node));
 611
 612         node->insthandle = NULL;
 613         node->cs = cs;
 614
 615         /*
 616          *      Names in the "modules" section aren't prefixed
 617          *      with "rlm_", so we add it here.
 618          */
 619         snprintf(module_name, sizeof(module_name), "rlm_%s", name1);
 620
 621         node->entry = linkto_module(module_name, cs);
 622         if (!node->entry) {
 623                 free(node);
 624                 /* linkto_module logs any errors */
 625                 return NULL;
 626         }
 627
 628         if (check_config && (node->entry->module->instantiate) &&
 629             (node->entry->module->type & RLM_TYPE_CHECK_CONFIG_SAFE) == 0) {
 630                 const char *value = NULL;
 631                 CONF_PAIR *cp;
 632
 633                 cp = cf_pair_find(cs, "force_check_config");
 634                 if (cp) value = cf_pair_value(cp);
 635
 636                 if (value && (strcmp(value, "yes") == 0)) goto print_inst;
 637
 638                 cf_log_module(cs, "Skipping instantiation of %s", instname);
 639         } else {
 640         print_inst:
 641                 check_config_safe = TRUE;
 642                 cf_log_module(cs, "Instantiating module \"%s\" from file %s",
 643                               instname, cf_section_filename(cs));
 644         }
 645
 646         /*
 647          *      Call the module's instantiation routine.
 648          */
 649         if ((node->entry->module->instantiate) &&
 650             (!check_config || check_config_safe) &&
 651             ((node->entry->module->instantiate)(cs, &node->insthandle) < 0)) {
 652                 cf_log_err(cf_sectiontoitem(cs),
 653                            "Instantiation failed for module \"%s\"",
 654                            instname);
 655                 free(node);
 656                 return NULL;
 657         }
 658
 659         /*
 660          *      We're done.  Fill in the rest of the data structure,
 661          *      and link it to the module instance list.
 662          */
 663         strlcpy(node->name, instname, sizeof(node->name));
 664
 665 #ifdef HAVE_PTHREAD_H
 666         /*
 667          *      If we're threaded, check if the module is thread-safe.
 668          *
 669          *      If it isn't, we create a mutex.
 670          */
 671         if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
 672                 node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
 673                 /*
 674                  *      Initialize the mutex.
 675                  */
 676                 pthread_mutex_init(node->mutex, NULL);
 677         } else {
 678                 /*
 679                  *      The module is thread-safe.  Don't give it a mutex.
 680                  */
 681                 node->mutex = NULL;
 682         }
 683
 684 #endif
 685         rbtree_insert(instance_tree, node);
 686
 687         return node;
 688 }
 689
 690 static indexed_modcallable *lookup_by_index(rbtree_t *components,
 691                                             int comp, int idx)
 692 {
 693         indexed_modcallable myc;
 694
 695         myc.comp = comp;
 696         myc.idx = idx;
 697
 698         return rbtree_finddata(components, &myc);
 699 }
 700
 701 /*
 702  *      Create a new sublist.
 703  */
 704 static indexed_modcallable *new_sublist(rbtree_t *components, int comp, int idx)
 705 {
 706         indexed_modcallable *c;
 707
 708         c = lookup_by_index(components, comp, idx);
 709
 710         /* It is an error to try to create a sublist that already
 711          * exists. It would almost certainly be caused by accidental
 712          * duplication in the config file.
 713          *
 714          * index 0 is the exception, because it is used when we want
 715          * to collect _all_ listed modules under a single index by
 716          * default, which is currently the case in all components
 717          * except authenticate. */
 718         if (c) {
 719                 if (idx == 0) {
 720                         return c;
 721                 }
 722                 return NULL;
 723         }
 724
 725         c = rad_malloc(sizeof(*c));
 726         c->modulelist = NULL;
 727         c->comp = comp;
 728         c->idx = idx;
 729
 730         if (!rbtree_insert(components, c)) {
 731                 free(c);
 732                 return NULL;
 733         }
 734
 735         return c;
 736 }
 737
 738 int indexed_modcall(int comp, int idx, REQUEST *request)
 739 {
 740         int rcode;
 741         modcallable *list = NULL;
 742         virtual_server_t *server;
 743
 744         /*
 745          *      Hack to find the correct virtual server.
 746          */
 747         server = virtual_server_find(request->server);
 748         if (!server) {
 749                 RDEBUG("No such virtual server \"%s\"", request->server);
 750                 return RLM_MODULE_FAIL;
 751         }
 752
 753         if (idx == 0) {
 754                 list = server->mc[comp];
 755                 if (!list) RDEBUG2("  WARNING: Empty %s section.  Using default return values.", section_type_value[comp].section);
 756
 757         } else {
 758                 indexed_modcallable *this;
 759
 760                 this = lookup_by_index(server->components, comp, idx);
 761                 if (this) {
 762                         list = this->modulelist;
 763                 } else {
 764                         RDEBUG2("  WARNING: Unknown value specified for %s.  Cannot perform requested action.",
 765                                 section_type_value[comp].typename);
 766                 }
 767         }
 768
 769         if (server->subcs[comp]) {
 770                 if (idx == 0) {
 771                         RDEBUG("# Executing section %s from file %s",
 772                                section_type_value[comp].section,
 773                                cf_section_filename(server->subcs[comp]));
 774                 } else {
 775                         RDEBUG("# Executing group from file %s",
 776                                cf_section_filename(server->subcs[comp]));
 777                 }
 778         }
 779         request->component = section_type_value[comp].section;
 780
 781         rcode = modcall(comp, list, request);
 782
 783         request->module = "";
 784         request->component = "<core>";
 785         return rcode;
 786 }
 787
 788 /*
 789  *      Load a sub-module list, as found inside an Auth-Type foo {}
 790  *      block
 791  */
 792 static int load_subcomponent_section(modcallable *parent, CONF_SECTION *cs,
 793                                      rbtree_t *components,
 794                                      const DICT_ATTR *dattr, int comp)
 795 {
 796         indexed_modcallable *subcomp;
 797         modcallable *ml;
 798         DICT_VALUE *dval;
 799         const char *name2 = cf_section_name2(cs);
 800
 801         rad_assert(comp >= RLM_COMPONENT_AUTH);
 802         rad_assert(comp < RLM_COMPONENT_COUNT);
 803
 804         /*
 805          *      Sanity check.
 806          */
 807         if (!name2) {
 808                 cf_log_err(cf_sectiontoitem(cs),
 809                            "No name specified for %s block",
 810                            section_type_value[comp].typename);
 811                 return 1;
 812         }
 813
 814         /*
 815          *      Compile the group.
 816          */
 817         ml = compile_modgroup(parent, comp, cs);
 818         if (!ml) {
 819                 return 0;
 820         }
 821
 822         /*
 823          *      We must assign a numeric index to this subcomponent.
 824          *      It is generated and placed in the dictionary
 825          *      automatically.  If it isn't found, it's a serious
 826          *      error.
 827          */
 828         dval = dict_valbyname(dattr->attr, dattr->vendor, name2);
 829         if (!dval) {
 830                 cf_log_err(cf_sectiontoitem(cs),
 831                            "%s %s Not previously configured",
 832                            section_type_value[comp].typename, name2);
 833                 modcallable_free(&ml);
 834                 return 0;
 835         }
 836
 837         subcomp = new_sublist(components, comp, dval->value);
 838         if (!subcomp) {
 839                 modcallable_free(&ml);
 840                 return 1;
 841         }
 842
 843         subcomp->modulelist = ml;
 844         return 1;               /* OK */
 845 }
 846
 847 static int define_type(const DICT_ATTR *dattr, const char *name)
 848 {
 849         uint32_t value;
 850         DICT_VALUE *dval;
 851
 852         /*
 853          *      If the value already exists, don't
 854          *      create it again.
 855          */
 856         dval = dict_valbyname(dattr->attr, dattr->vendor, name);
 857         if (dval) return 1;
 858
 859         /*
 860          *      Create a new unique value with a
 861          *      meaningless number.  You can't look at
 862          *      it from outside of this code, so it
 863          *      doesn't matter.  The only requirement
 864          *      is that it's unique.
 865          */
 866         do {
 867                 value = fr_rand() & 0x00ffffff;
 868         } while (dict_valbyattr(dattr->attr, dattr->vendor, value));
 869
 870         DEBUG2("  Module: Creating %s = %s", dattr->name, name);
 871         if (dict_addvalue(name, dattr->name, value) < 0) {
 872                 radlog(L_ERR, "%s", fr_strerror());
 873                 return 0;
 874         }
 875
 876         return 1;
 877 }
 878
 879 static int load_component_section(CONF_SECTION *cs,
 880                                   rbtree_t *components, int comp)
 881 {
 882         modcallable *this;
 883         CONF_ITEM *modref;
 884         int idx;
 885         indexed_modcallable *subcomp;
 886         const char *modname;
 887         const char *visiblename;
 888         const DICT_ATTR *dattr;
 889
 890         /*
 891          *      Find the attribute used to store VALUEs for this section.
 892          */
 893         dattr = dict_attrbyvalue(section_type_value[comp].attr, 0);
 894         if (!dattr) {
 895                 cf_log_err(cf_sectiontoitem(cs),
 896                            "No such attribute %s",
 897                            section_type_value[comp].typename);
 898                 return -1;
 899         }
 900
 901         /*
 902          *      Loop over the entries in the named section, loading
 903          *      the sections this time.
 904          */
 905         for (modref = cf_item_find_next(cs, NULL);
 906              modref != NULL;
 907              modref = cf_item_find_next(cs, modref)) {
 908                 const char *name1;
 909                 CONF_PAIR *cp = NULL;
 910                 CONF_SECTION *scs = NULL;
 911
 912                 if (cf_item_is_section(modref)) {
 913                         scs = cf_itemtosection(modref);
 914
 915                         name1 = cf_section_name1(scs);
 916
 917                         if (strcmp(name1,
 918                                    section_type_value[comp].typename) == 0) {
 919                                 if (!load_subcomponent_section(NULL, scs,
 920                                                                components,
 921                                                                dattr,
 922                                                                comp)) {
 923                                         return -1; /* FIXME: memleak? */
 924                                 }
 925                                 continue;
 926                         }
 927
 928                         cp = NULL;
 929
 930                 } else if (cf_item_is_pair(modref)) {
 931                         cp = cf_itemtopair(modref);
 932
 933                 } else {
 934                         continue; /* ignore it */
 935                 }
 936
 937                 /*
 938                  *      Try to compile one entry.
 939                  */
 940                 this = compile_modsingle(NULL, comp, modref, &modname);
 941                 if (!this) {
 942                         cf_log_err(cf_sectiontoitem(cs),
 943                                    "Errors parsing %s section.\n",
 944                                    cf_section_name1(cs));
 945                         return -1;
 946                 }
 947
 948                 /*
 949                  *      Look for Auth-Type foo {}, which are special
 950                  *      cases of named sections, and allowable ONLY
 951                  *      at the top-level.
 952                  *
 953                  *      i.e. They're not allowed in a "group" or "redundant"
 954                  *      subsection.
 955                  */
 956                 if (comp == RLM_COMPONENT_AUTH) {
 957                         DICT_VALUE *dval;
 958                         const char *modrefname = NULL;
 959                         if (cp) {
 960                                 modrefname = cf_pair_attr(cp);
 961                         } else {
 962                                 modrefname = cf_section_name2(scs);
 963                                 if (!modrefname) {
 964                                         modcallable_free(&this);
 965                                         cf_log_err(cf_sectiontoitem(cs),
 966                                                    "Errors parsing %s sub-section.\n",
 967                                                    cf_section_name1(scs));
 968                                         return -1;
 969                                 }
 970                         }
 971
 972                         dval = dict_valbyname(PW_AUTH_TYPE, 0, modrefname);
 973                         if (!dval) {
 974                                 /*
 975                                  *      It's a section, but nothing we
 976                                  *      recognize.  Die!
 977                                  */
 978                                 modcallable_free(&this);
 979                                 cf_log_err(cf_sectiontoitem(cs),
 980                                            "Unknown Auth-Type \"%s\" in %s sub-section.",
 981                                            modrefname, section_type_value[comp].section);
 982                                 return -1;
 983                         }
 984                         idx = dval->value;
 985                 } else {
 986                         /* See the comment in new_sublist() for explanation
 987                          * of the special index 0 */
 988                         idx = 0;
 989                 }
 990
 991                 subcomp = new_sublist(components, comp, idx);
 992                 if (subcomp == NULL) {
 993                         modcallable_free(&this);
 994                         continue;
 995                 }
 996
 997                 /* If subcomp->modulelist is NULL, add_to_modcallable will
 998                  * create it */
 999                 visiblename = cf_section_name2(cs);
1000                 if (visiblename == NULL)
1001                         visiblename = cf_section_name1(cs);
1002                 add_to_modcallable(&subcomp->modulelist, this,
1003                                    comp, visiblename);
1004         }
1005
1006         return 0;
1007 }
1008
1009 static int load_byserver(CONF_SECTION *cs)
1010 {
1011         int comp, flag;
1012         const char *name = cf_section_name2(cs);
1013         rbtree_t *components;
1014         virtual_server_t *server = NULL;
1015         indexed_modcallable *c;
1016
1017         if (name) {
1018                 cf_log_info(cs, "server %s { # from file %s",
1019                             name, cf_section_filename(cs));
1020         } else {
1021                 cf_log_info(cs, "server { # from file %s",
1022                             cf_section_filename(cs));
1023         }
1024
1025         cf_log_info(cs, " modules {");
1026
1027         components = rbtree_create(indexed_modcallable_cmp,
1028                                    indexed_modcallable_free, 0);
1029         if (!components) {
1030                 radlog(L_ERR, "Failed to initialize components\n");
1031                 goto error;
1032         }
1033
1034         server = rad_malloc(sizeof(*server));
1035         memset(server, 0, sizeof(*server));
1036
1037         server->name = name;
1038         server->created = time(NULL);
1039         server->cs = cs;
1040         server->components = components;
1041
1042         /*
1043          *      Define types first.
1044          */
1045         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
1046                 CONF_SECTION *subcs;
1047                 CONF_ITEM *modref;
1048                 DICT_ATTR *dattr;
1049
1050                 subcs = cf_section_sub_find(cs,
1051                                             section_type_value[comp].section);
1052                 if (!subcs) continue;
1053
1054                 if (cf_item_find_next(subcs, NULL) == NULL) continue;
1055
1056                 /*
1057                  *      Find the attribute used to store VALUEs for this section.
1058                  */
1059                 dattr = dict_attrbyvalue(section_type_value[comp].attr, 0);
1060                 if (!dattr) {
1061                         cf_log_err(cf_sectiontoitem(subcs),
1062                                    "No such attribute %s",
1063                                    section_type_value[comp].typename);
1064                 error:
1065                         if (debug_flag == 0) {
1066                                 radlog(L_ERR, "Failed to load virtual server %s",
1067                                        (name != NULL) ? name : "<default>");
1068                         }
1069                         virtual_server_free(server);
1070                         return -1;
1071                 }
1072
1073                 /*
1074                  *      Define dynamic types, so that others can reference
1075                  *      them.
1076                  */
1077                 for (modref = cf_item_find_next(subcs, NULL);
1078                      modref != NULL;
1079                      modref = cf_item_find_next(subcs, modref)) {
1080                         const char *name1;
1081                         CONF_SECTION *subsubcs;
1082
1083                         /*
1084                          *      Create types for simple references
1085                          *      only when parsing the authenticate
1086                          *      section.
1087                          */
1088                         if ((section_type_value[comp].attr == PW_AUTH_TYPE) &&
1089                             cf_item_is_pair(modref)) {
1090                                 CONF_PAIR *cp = cf_itemtopair(modref);
1091                                 if (!define_type(dattr, cf_pair_attr(cp))) {
1092                                         goto error;
1093                                 }
1094
1095                                 continue;
1096                         }
1097
1098                         if (!cf_item_is_section(modref)) continue;
1099
1100                         subsubcs = cf_itemtosection(modref);
1101                         name1 = cf_section_name1(subsubcs);
1102
1103                         if (strcmp(name1, section_type_value[comp].typename) == 0) {
1104                                 if (!define_type(dattr,
1105                                                  cf_section_name2(subsubcs))) {
1106                                         goto error;
1107                                 }
1108                         }
1109                 }
1110         } /* loop over components */
1111
1112         /*
1113          *      Loop over all of the known components, finding their
1114          *      configuration section, and loading it.
1115          */
1116         flag = 0;
1117         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
1118                 CONF_SECTION *subcs;
1119
1120                 subcs = cf_section_sub_find(cs,
1121                                             section_type_value[comp].section);
1122                 if (!subcs) continue;
1123
1124                 if (cf_item_find_next(subcs, NULL) == NULL) continue;
1125
1126                 cf_log_module(cs, "Checking %s {...} for more modules to load",
1127                        section_type_value[comp].section);
1128
1129                 /*
1130                  *      Skip pre/post-proxy sections if we're not
1131                  *      proxying.
1132                  */
1133                 if (
1134 #ifdef WITH_PROXY
1135                     !mainconfig.proxy_requests &&
1136 #endif
1137                     ((comp == RLM_COMPONENT_PRE_PROXY) ||
1138                      (comp == RLM_COMPONENT_POST_PROXY))) {
1139                         continue;
1140                 }
1141
1142 #ifndef WITH_ACCOUNTING
1143                 if (comp == RLM_COMPONENT_ACCT) continue;
1144 #endif
1145
1146 #ifndef WITH_SESSION_MGMT
1147                 if (comp == RLM_COMPONENT_SESS) continue;
1148 #endif
1149
1150                 if (load_component_section(subcs, components, comp) < 0) {
1151                         goto error;
1152                 }
1153
1154                 /*
1155                  *      Cache a default, if it exists.  Some people
1156                  *      put empty sections for some reason...
1157                  */
1158                 c = lookup_by_index(components, comp, 0);
1159                 if (c) server->mc[comp] = c->modulelist;
1160
1161                 server->subcs[comp] = subcs;
1162
1163                 flag = 1;
1164         } /* loop over components */
1165
1166         /*
1167          *      We haven't loaded any of the normal sections.  Maybe we're
1168          *      supposed to load the vmps section.
1169          *
1170          *      This is a bit of a hack...
1171          */
1172         if (!flag) {
1173                 CONF_SECTION *subcs;
1174
1175                 subcs = cf_section_sub_find(cs, "vmps");
1176                 if (subcs) {
1177                         cf_log_module(cs, "Checking vmps {...} for more modules to load");
1178                         if (load_component_section(subcs, components,
1179                                                    RLM_COMPONENT_POST_AUTH) < 0) {
1180                                 goto error;
1181                         }
1182                         c = lookup_by_index(components,
1183                                             RLM_COMPONENT_POST_AUTH, 0);
1184                         if (c) server->mc[RLM_COMPONENT_POST_AUTH] = c->modulelist;
1185                         flag = 1;
1186                 }
1187
1188 #ifdef WITH_DHCP
1189                 if (!flag) {
1190                         const DICT_ATTR *dattr;
1191
1192                         dattr = dict_attrbyname("DHCP-Message-Type");
1193
1194                         /*
1195                          *      Handle each DHCP Message type separately.
1196                          */
1197                         if (dattr) for (subcs = cf_subsection_find_next(cs, NULL, "dhcp");
1198                                         subcs != NULL;
1199                                         subcs = cf_subsection_find_next(cs, subcs,
1200                                                                         "dhcp")) {
1201                                 const char *name2 = cf_section_name2(subcs);
1202
1203                                 DEBUG2(" Module: Checking dhcp %s {...} for more modules to load", name2);
1204                                 if (!load_subcomponent_section(NULL, subcs,
1205                                                                components,
1206                                                                dattr,
1207                                                                RLM_COMPONENT_POST_AUTH)) {
1208                                         goto error; /* FIXME: memleak? */
1209                                 }
1210                                 c = lookup_by_index(components,
1211                                                     RLM_COMPONENT_POST_AUTH, 0);
1212                                 if (c) server->mc[RLM_COMPONENT_POST_AUTH] = c->modulelist;
1213                                 flag = 1;
1214                         }
1215                 }
1216 #endif
1217         }
1218
1219         cf_log_info(cs, " } # modules");
1220         cf_log_info(cs, "} # server");
1221
1222         if (!flag && name) {
1223                 DEBUG("WARNING: Server %s is empty, and will do nothing!",
1224                       name);
1225         }
1226
1227         if (debug_flag == 0) {
1228                 radlog(L_INFO, "Loaded virtual server %s",
1229                        (name != NULL) ? name : "<default>");
1230         }
1231
1232         /*
1233          *      Now that it is OK, insert it into the list.
1234          *
1235          *      This is thread-safe...
1236          */
1237         comp = virtual_server_idx(name);
1238         server->next = virtual_servers[comp];
1239         virtual_servers[comp] = server;
1240
1241         /*
1242          *      Mark OLDER ones of the same name as being unused.
1243          */
1244         server = server->next;
1245         while (server) {
1246                 if ((!name && !server->name) ||
1247                     (name && server->name &&
1248                      (strcmp(server->name, name) == 0))) {
1249                         server->can_free = TRUE;
1250                         break;
1251                 }
1252                 server = server->next;
1253         }
1254
1255         return 0;
1256 }
1257
1258
1259 /*
1260  *      Load all of the virtual servers.
1261  */
1262 int virtual_servers_load(CONF_SECTION *config)
1263 {
1264         CONF_SECTION *cs;
1265         static int first_time = TRUE;
1266
1267         DEBUG2("%s: #### Loading Virtual Servers ####", mainconfig.name);
1268
1269         /*
1270          *      If we have "server { ...}", then there SHOULD NOT be
1271          *      bare "authorize", etc. sections.  if there is no such
1272          *      server, then try to load the old-style sections first.
1273          *
1274          *      In either case, load the "default" virtual server first.
1275          *      this matches better iwth users expectations.
1276          */
1277         cs = cf_section_find_name2(cf_subsection_find_next(config, NULL,
1278                                                            "server"),
1279                                    "server", NULL);
1280         if (cs) {
1281                 if (load_byserver(cs) < 0) {
1282                         return -1;
1283                 }
1284         } else {
1285                 if (load_byserver(config) < 0) {
1286                         return -1;
1287                 }
1288         }
1289
1290         /*
1291          *      Load all of the virtual servers.
1292          */
1293         for (cs = cf_subsection_find_next(config, NULL, "server");
1294              cs != NULL;
1295              cs = cf_subsection_find_next(config, cs, "server")) {
1296                 const char *name2;
1297                 virtual_server_t *server;
1298
1299                 name2 = cf_section_name2(cs);
1300                 if (!name2) continue; /* handled above */
1301
1302                 server = virtual_server_find(name2);
1303                 if (server &&
1304                     (cf_top_section(server->cs) == config)) {
1305                         radlog(L_ERR, "Duplicate virtual server \"%s\" in file %s:%d and file %s:%d",
1306                                server->name,
1307                                cf_section_filename(server->cs),
1308                                cf_section_lineno(server->cs),
1309                                cf_section_filename(cs),
1310                                cf_section_lineno(cs));
1311                         return -1;
1312                 }
1313
1314                 if (load_byserver(cs) < 0) {
1315                         /*
1316                          *      Once we successfully started once,
1317                          *      continue loading the OTHER servers,
1318                          *      even if one fails.
1319                          */
1320                         if (!first_time) continue;
1321                         return -1;
1322                 }
1323         }
1324
1325         /*
1326          *      If we succeed the first time around, remember that.
1327          */
1328         first_time = FALSE;
1329
1330         return 0;
1331 }
1332
1333 int module_hup_module(CONF_SECTION *cs, module_instance_t *node, time_t when)
1334 {
1335         void *insthandle = NULL;
1336         fr_module_hup_t *mh;
1337
1338         if (!node ||
1339             !node->entry->module->instantiate ||
1340             ((node->entry->module->type & RLM_TYPE_HUP_SAFE) == 0)) {
1341                 return 1;
1342         }
1343
1344         cf_log_module(cs, "Trying to reload module \"%s\"", node->name);
1345
1346         if ((node->entry->module->instantiate)(cs, &insthandle) < 0) {
1347                 cf_log_err(cf_sectiontoitem(cs),
1348                            "HUP failed for module \"%s\".  Using old configuration.",
1349                            node->name);
1350                 return 0;
1351         }
1352
1353         radlog(L_INFO, " Module: Reloaded module \"%s\"", node->name);
1354
1355         module_instance_free_old(cs, node, when);
1356
1357         /*
1358          *      Save the old instance handle for later deletion.
1359          */
1360         mh = rad_malloc(sizeof(*mh));
1361         mh->mi = node;
1362         mh->when = when;
1363         mh->insthandle = node->insthandle;
1364         mh->next = node->mh;
1365         node->mh = mh;
1366
1367         node->insthandle = insthandle;
1368
1369         /*
1370          *      FIXME: Set a timeout to come back in 60s, so that
1371          *      we can pro-actively clean up the old instances.
1372          */
1373
1374         return 1;
1375 }
1376
1377
1378 int module_hup(CONF_SECTION *modules)
1379 {
1380         time_t when;
1381         CONF_ITEM *ci;
1382         CONF_SECTION *cs;
1383         module_instance_t *node;
1384
1385         if (!modules) return 0;
1386
1387         when = time(NULL);
1388
1389         /*
1390          *      Loop over the modules
1391          */
1392         for (ci=cf_item_find_next(modules, NULL);
1393              ci != NULL;
1394              ci=cf_item_find_next(modules, ci)) {
1395                 const char *instname;
1396                 module_instance_t myNode;
1397
1398                 /*
1399                  *      If it's not a section, ignore it.
1400                  */
1401                 if (!cf_item_is_section(ci)) continue;
1402
1403                 cs = cf_itemtosection(ci);
1404                 instname = cf_section_name2(cs);
1405                 if (!instname) instname = cf_section_name1(cs);
1406
1407                 strlcpy(myNode.name, instname, sizeof(myNode.name));
1408                 node = rbtree_finddata(instance_tree, &myNode);
1409
1410                 module_hup_module(cs, node, when);
1411         }
1412
1413         return 1;
1414 }
1415
1416
1417 /*
1418  *      Parse the module config sections, and load
1419  *      and call each module's init() function.
1420  *
1421  *      Libtool makes your life a LOT easier, especially with libltdl.
1422  *      see: http://www.gnu.org/software/libtool/
1423  */
1424 int setup_modules(int reload, CONF_SECTION *config)
1425 {
1426         CONF_ITEM       *ci, *next;
1427         CONF_SECTION    *cs, *modules;
1428         rad_listen_t    *listener;
1429
1430         if (reload) return 0;
1431
1432         /*
1433          *      If necessary, initialize libltdl.
1434          */
1435         if (!reload) {
1436                 /*
1437                  *      This line works around a completely
1438                  *
1439                  *              RIDICULOUS INSANE IDIOTIC
1440                  *
1441                  *      bug in libltdl on certain systems.  The "set
1442                  *      preloaded symbols" macro below ends up
1443                  *      referencing this name, but it isn't defined
1444                  *      anywhere in the libltdl source.  As a result,
1445                  *      any program STUPID enough to rely on libltdl
1446                  *      fails to link, because the symbol isn't
1447                  *      defined anywhere.
1448                  *
1449                  *      It's like libtool and libltdl are some kind
1450                  *      of sick joke.
1451                  */
1452 #ifdef IE_LIBTOOL_DIE
1453 #define lt__PROGRAM__LTX_preloaded_symbols lt_libltdl_LTX_preloaded_symbols
1454 #endif
1455
1456                 /*
1457                  *      Set the default list of preloaded symbols.
1458                  *      This is used to initialize libltdl's list of
1459                  *      preloaded modules.
1460                  *
1461                  *      i.e. Static modules.
1462                  */
1463                 LTDL_SET_PRELOADED_SYMBOLS();
1464
1465                 if (lt_dlinit() != 0) {
1466                         radlog(L_ERR, "Failed to initialize libraries: %s\n",
1467                                         lt_dlerror());
1468                         return -1;
1469                 }
1470
1471                 /*
1472                  *      Set the search path to ONLY our library directory.
1473                  *      This prevents the modules from being found from
1474                  *      any location on the disk.
1475                  */
1476                 lt_dlsetsearchpath(radlib_dir);
1477
1478                 /*
1479                  *      Set up the internal module struct.
1480                  */
1481                 module_tree = rbtree_create(module_entry_cmp,
1482                                             module_entry_free, 0);
1483                 if (!module_tree) {
1484                         radlog(L_ERR, "Failed to initialize modules\n");
1485                         return -1;
1486                 }
1487
1488                 instance_tree = rbtree_create(module_instance_cmp,
1489                                               module_instance_free, 0);
1490                 if (!instance_tree) {
1491                         radlog(L_ERR, "Failed to initialize modules\n");
1492                         return -1;
1493                 }
1494         }
1495
1496         memset(virtual_servers, 0, sizeof(virtual_servers));
1497
1498         /*
1499          *      Remember where the modules were stored.
1500          */
1501         modules = cf_section_sub_find(config, "modules");
1502         if (!modules) {
1503                 radlog(L_INFO, "WARNING: Cannot find a \"modules\" section in the configuration file!");
1504         }
1505
1506         DEBUG2("%s: #### Instantiating modules ####", mainconfig.name);
1507
1508         /*
1509          *      Loop over module definitions, looking for duplicates.
1510          *
1511          *      This is O(N^2) in the number of modules, but most
1512          *      systems should have less than 100 modules.
1513          */
1514         for (ci=cf_item_find_next(modules, NULL);
1515              ci != NULL;
1516              ci=next) {
1517                 const char *name1, *name2;
1518                 CONF_SECTION *subcs, *duplicate;
1519
1520                 next = cf_item_find_next(modules, ci);
1521
1522                 if (!cf_item_is_section(ci)) continue;
1523
1524                 if (!next || !cf_item_is_section(next)) continue;
1525
1526                 subcs = cf_itemtosection(ci);
1527                 name1 = cf_section_name1(subcs);
1528                 name2 = cf_section_name2(subcs);
1529
1530                 duplicate = cf_section_find_name2(cf_itemtosection(next),
1531                                                   name1, name2);
1532                 if (!duplicate) continue;
1533
1534                 if (!name2) name2 = "";
1535
1536                 radlog(L_ERR, "Duplicate module \"%s %s\", in file %s:%d and file %s:%d",
1537                        name1, name2,
1538                        cf_section_filename(subcs),
1539                        cf_section_lineno(subcs),
1540                        cf_section_filename(duplicate),
1541                        cf_section_lineno(duplicate));
1542                 return -1;
1543         }
1544
1545         /*
1546          *  Look for the 'instantiate' section, which tells us
1547          *  the instantiation order of the modules, and also allows
1548          *  us to load modules with no authorize/authenticate/etc.
1549          *  sections.
1550          */
1551         cs = cf_section_sub_find(config, "instantiate");
1552         if (cs != NULL) {
1553                 CONF_PAIR *cp;
1554                 module_instance_t *module;
1555                 const char *name;
1556
1557                 cf_log_info(cs, " instantiate {");
1558
1559                 /*
1560                  *  Loop over the items in the 'instantiate' section.
1561                  */
1562                 for (ci=cf_item_find_next(cs, NULL);
1563                      ci != NULL;
1564                      ci=cf_item_find_next(cs, ci)) {
1565
1566                         /*
1567                          *      Skip sections and "other" stuff.
1568                          *      Sections will be handled later, if
1569                          *      they're referenced at all...
1570                          */
1571                         if (!cf_item_is_pair(ci)) {
1572                                 continue;
1573                         }
1574
1575                         cp = cf_itemtopair(ci);
1576                         name = cf_pair_attr(cp);
1577                         module = find_module_instance(modules, name, 1);
1578                         if (!module) {
1579                                 return -1;
1580                         }
1581                 } /* loop over items in the subsection */
1582
1583                 cf_log_info(cs, " }");
1584         } /* if there's an 'instantiate' section. */
1585
1586         /*
1587          *      Loop over the listeners, figuring out which sections
1588          *      to load.
1589          */
1590         for (listener = mainconfig.listen;
1591              listener != NULL;
1592              listener = listener->next) {
1593                 char buffer[256];
1594
1595 #ifdef WITH_PROXY
1596                 if (listener->type == RAD_LISTEN_PROXY) continue;
1597 #endif
1598
1599                 cs = cf_section_sub_find_name2(config,
1600                                                "server", listener->server);
1601                 if (!cs && (listener->server != NULL)) {
1602                         listener->print(listener, buffer, sizeof(buffer));
1603
1604                         radlog(L_ERR, "No server has been defined for %s", buffer);
1605                         return -1;
1606                 }
1607         }
1608
1609         if (virtual_servers_load(config) < 0) return -1;
1610
1611         return 0;
1612 }
1613
1614 /*
1615  *      Call all authorization modules until one returns
1616  *      somethings else than RLM_MODULE_OK
1617  */
1618 int module_authorize(int autz_type, REQUEST *request)
1619 {
1620         return indexed_modcall(RLM_COMPONENT_AUTZ, autz_type, request);
1621 }
1622
1623 /*
1624  *      Authenticate a user/password with various methods.
1625  */
1626 int module_authenticate(int auth_type, REQUEST *request)
1627 {
1628         return indexed_modcall(RLM_COMPONENT_AUTH, auth_type, request);
1629 }
1630
1631 #ifdef WITH_ACCOUNTING
1632 /*
1633  *      Do pre-accounting for ALL configured sessions
1634  */
1635 int module_preacct(REQUEST *request)
1636 {
1637         return indexed_modcall(RLM_COMPONENT_PREACCT, 0, request);
1638 }
1639
1640 /*
1641  *      Do accounting for ALL configured sessions
1642  */
1643 int module_accounting(int acct_type, REQUEST *request)
1644 {
1645         return indexed_modcall(RLM_COMPONENT_ACCT, acct_type, request);
1646 }
1647 #endif
1648
1649 #ifdef WITH_SESSION_MGMT
1650 /*
1651  *      See if a user is already logged in.
1652  *
1653  *      Returns: 0 == OK, 1 == double logins, 2 == multilink attempt
1654  */
1655 int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
1656 {
1657         int rcode;
1658
1659         if(!request->username)
1660                 return 0;
1661
1662         request->simul_count = 0;
1663         request->simul_max = maxsimul;
1664         request->simul_mpp = 1;
1665
1666         rcode = indexed_modcall(RLM_COMPONENT_SESS, sess_type, request);
1667
1668         if (rcode != RLM_MODULE_OK) {
1669                 /* FIXME: Good spot for a *rate-limited* warning to the log */
1670                 return 0;
1671         }
1672
1673         return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
1674 }
1675 #endif
1676
1677 #ifdef WITH_PROXY
1678 /*
1679  *      Do pre-proxying for ALL configured sessions
1680  */
1681 int module_pre_proxy(int type, REQUEST *request)
1682 {
1683         return indexed_modcall(RLM_COMPONENT_PRE_PROXY, type, request);
1684 }
1685
1686 /*
1687  *      Do post-proxying for ALL configured sessions
1688  */
1689 int module_post_proxy(int type, REQUEST *request)
1690 {
1691         return indexed_modcall(RLM_COMPONENT_POST_PROXY, type, request);
1692 }
1693 #endif
1694
1695 /*
1696  *      Do post-authentication for ALL configured sessions
1697  */
1698 int module_post_auth(int postauth_type, REQUEST *request)
1699 {
1700         return indexed_modcall(RLM_COMPONENT_POST_AUTH, postauth_type, request);
1701 }
1702
1703 #ifdef WITH_COA
1704 int module_recv_coa(int recv_coa_type, REQUEST *request)
1705 {
1706         return indexed_modcall(RLM_COMPONENT_RECV_COA, recv_coa_type, request);
1707 }
1708
1709 int module_send_coa(int send_coa_type, REQUEST *request)
1710 {
1711         return indexed_modcall(RLM_COMPONENT_SEND_COA, send_coa_type, request);
1712 }
1713 #endif